[tz] [PATCH 00/10] Zone Table Comments

[Paul Eggert]

J William Piggott wrote:
>> Please select one of the following time zone regions.
>> >1) Newfoundland; Labrador (southeast)    15) Central - NU (Resolute)
>> >2) Atlantic - NS (most areas); PE    16) Central - NU (central)
>> >3) Atlantic - NS (Cape Breton)        17) CST - SK (most areas)
>> >4) Atlantic - New Brunswick        18) CST - SK (midwest)
>> >5) Atlantic - Labrador (most areas)    19) Mountain - AB; BC (E); SK (W)
>> >6) AST - QC (Lower North Shore)    20) Mountain - NU (west)
>> >7) Eastern - ON, QC (most areas)    21) Mountain - NT (central)
>> >8) Eastern - ON, QC (no DST 1967-73)    22) Mountain - NT (west)
>> >9) Eastern - ON (Thunder Bay)        23) MST - BC (Creston)
>> >10) Eastern - NU (most east areas)    24) MST - BC (Dawson Cr, Ft St John)
>> >11) Eastern - NU (Pangnirtung)        25) MST - BC (Ft Nelson)
>> >12) EST - ON (Atikokan); NU (Coral H)    26) Pacific - BC (most areas)
>> >13) Central - ON (west); Manitoba    27) Pacific - Yukon (south)
>> >14) Central - ON (Rainy R, Ft Frances)    28) Pacific - Yukon (north)
>> >#?
> ...
> Is DST information needed to choose a
> zone file? In the example list above it doesn't seem to be.

In the above list (whose formatting has been trashed by the various email 
software we're using) the name "Eastern" is short for Eastern time with daylight 
saving, whereas "EST" is short for Eastern Standard Time only, and similarly for 
other names. Presumably someone who knows or infers this can exploit their 
knowledge when selecting.